|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
| Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum |
  |
|
|
|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving |
 |
|
|
Thread Tools | Search this Thread |
9th April 2012, 05:25 AM
|
#11 | |
|
diyAudio Member
Join Date: Sep 2011
Location: El Triunfo
|
Quote:
|
|
|
|
9th April 2012, 06:00 AM
|
#12 |
|
diyAudio Member
Join Date: Sep 2011
Location: El Triunfo
|
Hi all!
Is this the schematic can be developed valve line stage preamp with PCC88 or with ECC88 or some are needed changes ?  Here's the comment. thank you and cheers! Last edited by formula 22; 9th April 2012 at 06:13 AM. |
|
|
|
9th April 2012, 06:53 AM
|
#14 |
|
diyAudio Member
Join Date: Sep 2011
Location: El Triunfo
|
Either schematic should like this look!?
Last edited by formula 22; 9th April 2012 at 07:13 AM. |
|
|
|
9th April 2012, 07:26 AM
|
#16 | |
|
diyAudio Member
Join Date: Sep 2011
Location: El Triunfo
|
Quote:
thank you P.S. The output is this of to reduce the gain to 10x Last edited by formula 22; 9th April 2012 at 07:30 AM. |
|
|
|
|
9th April 2012, 01:54 PM
|
#18 |
|
diyAudio Member
Join Date: Jun 2007
Location: Holt, Norfolk
|
That schematic looks about right to me. Operating point is around 9mA, plate dissipation is under 1 watt. Gain should be close to 10 with that plate load pot divider. Output impedance may be higher than you desire because cathode bias resistor is not bypassed. This increases effective plate resistance from around 3K to about 10K and increases distortion.I would recommend bypassing the cathode resistor.
Cheers Ian
__________________
Ian |
|
|
|
10th April 2012, 05:57 AM
|
#19 | |
|
diyAudio Member
Join Date: Sep 2011
Location: El Triunfo
|
modifications
Quote:
The signs of these changes on the cathode you think. Cathode to bypassing the resistor R1 = 220Ohm/0,25W and the electrolytic capacitor C1= 680uF/16V. I think that the anode current is about 11mA?. This schematic now has as much gain and what is the output Impedance? What is the gain without the capacitor C1? Thanks and cheers!  P.S. If you have another suggestion you name it. Last edited by formula 22; 10th April 2012 at 06:18 AM. |
|
|
|
|
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| A Heretical Unity gain line stage | SY | Tubes / Valves | 86 | 26th April 2013 10:18 AM |
| Heretical Unity Gain line stage PLUS a little gain ? | yagas | Tubes / Valves | 7 | 24th January 2006 01:30 PM |
| Line stage preamp, based on SY's "Heretical Unity gain line stage" | Danko | Tubes / Valves | 23 | 18th July 2005 04:07 AM |
| Balanced line stage gain problem ! | lykkedk | Pass Labs | 9 | 19th June 2003 07:24 PM |
| New To Site? | Need Help? |
